Pail.



No. 756,406. PATENTED APR. 5, 1904.

C. PUDDEFOT & B. BRISGOE.

PAIL.

APPLIoATIoN FILED Nov.14, 190s.

H0 MODEL.

Imi?" Patented April 5, 1904.

UNTTEE STATES PATENT OFFICE.

CHARLES PUDDEFOOT AND BENJAMIN BRISCOE, OF DETROIT, MICHIGAN,

ASSIGNORS TO BRISCOE MANUFACTURING COMPANY, OF DETROIT, MICHIGAN, ACORPORATION OF MICHIGAN.

PAIL.

SPECIFICATION forming part of Letters Patent No. 756,406, dated April 5,1904.

Application filed November 14, 1903, Serial No. 181,170. (No model.)

To al?, whom, it may concern:

Be it known that we, CHARLES PUDDEEOOT and BENJAMIN BRisooE, citizens ofthe United States, residing at Detroit, in the county of Vayne and Stateof Michigan, have invented certain new and useful Improvements in Fails,of which the following is a specification, reference being had thereinto the accompanying drawings.

The invention relates to the manufacture of vessels formed of sheetmetal and having corrugated walls.

More particularly, the invention relates to the manufacture ofsheet-metal buckets or I5 pails having Haring Walls which arecorrugated.

lt is the object of the invention to obtain a vessel of the characterdescribed and which is further characterized by having the Walls 2Othereof formed with plain zones at opposite ends and an intermediatecurrugated portion, whereby great strength and rigidity is imparted tothe vessel.

The invention consists in the peculiar construction of the vessel and inthe novel method of manufacturing' the same.

In the drawings, Figure lis an elevation of the vessel. Fig. 2 is avertical section through the corrugated wall of the vessel; Fig. 3 is aplan of the sheet-metal blanks from which the walls of the vessel areformed. Fig. 4 is a horizontal section through a pair of blanks bentinto half -round form and seamed together. Fig. 5 is a diagrammatic viewillustrating the manner of corrugating the walls of the vessel and therolls for forming the same. Fig. 6 is a horizontal section through aportion of the corrugated Wall of the vessel.

A is a sheet-metal blank forming a segment,

preferably one-half, of the wall for the vessel. This blank is formedwith curved edges a and Z) and a tapering straight side c, so that whenformed up and joined with its complementary blank a conical wall will beproduced.

A pair of the blanks A being thus formed, the segments are joined asillustrated in Fig. 4. The upper end of the wall is then preferablybeaded, as at CZ, and a bottom e is seamed to Vthe lower edge in any ofthe well-known methods of manufacturing sheet-metal Vessels.

Heretofore sheet-metal vessels having corrugated walls have been formedby first corrugating the blank from which the wall is formed andafterward bending said blank into its round form. In the improved methodwhich forms a part of the subject-matter of this invention the vesselwith plain walls is first completely formed and subsequently iscorrugated. This facilitates the manufacture of the Wall from segmentalblanks and permits of these blanks being seamed together, while at thesame time the complete vessel may be corrugated in the seamed portion aswell as the other portions of the Walls. In the corrugation of thecompleted vessel a difliculty 'is encountered which is not present inthe corrugation of the flat blank. This is due to the fact that it isdesirable to retain plain zones above and below the corrugated portionof the wall, and the diiculty is to avoid crimping or distorting theseplain zones during the operation of corrugating. We have overcome thisdiliiculty by so forming the corrugated zone of the wall that everyportion thereof is of substantially the same length of contourcircumferentially as the corresponding portion of the plain Wall.l Thisnecessitates the contraction in diameter of the circumscribing circle ofeach portion of the corrugated zone, and inasmuch as the wall is ofconical or upwardly-flaring form each portion of the corrugated zone invertical cross-section is differently contracted in diameter-that is,there is a progressive contraction which is proportionately greatest atthe upper or large end of the vessel and least at the lower or smallerend. For producing this result We preferably employ a pair of corrugatedconical rolls C and D. These are provided with plain portions E atopposite ends and intermediate uted portions F. The roll D, which isdesigned to contact with the outer face of the wall of the vessel, hasits fluted portion projecting beyond the line of its plain portions,while the roll C has its flutes depressed below the line of the plainportions. Thus the corrugations formed in the sheet-metal wall will bebent inward. and the proportion of parts is such that this inwardbending or contraction in diameter exactly compensates for the increasein length of the wavy line in comparison with a plain circle or arc, sothat precisely the same length of contour is maintained. As aconsequence the sheet metal is not either expanded or contractedcircumferentially, and thus there is no tendency to exert a strain uponthe plain Zones which would tend to distort the latter. The ends of thecorrugations are rounded off so as to gradually merge into the plainZones and the necessary expansion of the metal to produce these roundedends is in the longitudinal direction and in the line of contact of therolls with the wall. Thus no distortion of the metal in the plain zonesis effected in either direction.

What we claim as our invention is- 1. Avessel providedwith a iaringannular wall formed from sheet metal, having plain Zones at oppositeends and an intermediate corrugated Zone crimped to contract thediameter of the circumscribing circle.

tial length of contour as before the crimping.

3. A vessel provided with a flaring annular wall .formed from sheetmetal having plain zones at opposite ends and an intermediate corrugatedzone with rounded ends to the corrugations merging into the plain Zonesthe diameter of the circumscribing circle for each portion of thecorrugated Zone being contracted to maintain the length of the wavy linesubstantially equal to the circumference oi' the uncorrugated blank. v

In testimony whereoi:l we affix our signatures in presence of twowitnesses.

CHARLES PUDDEFOOT. BENJAMIN BRISCOE.

Witnesses FRANK BRIsooE, LILLIE BRowNELL.

